/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMModel/RigVMSchema.h
Returns true if a graph supports a given external variable.
virtual bool SupportsExternalVariable ( [URigVMController](API\Plugins\RigVMDeveloper\RigVMModel\URigVMController) * InController, const [FRigVMExternalVariable](API\Plugins\RigVM\RigVMCore\FRigVMExternalVariable) * InExternalVariable ) const